ci: Use actions/setup-python@v4

This commit updates the CI workflows to use the latest "setup-python"
action v4, which is based on Node.js 16.

Note that Node.js 12-based actions are now deprecated by GitHub and may
stop working in the near future.

Signed-off-by: Stephanos Ioannidis <[email protected]>

Author: stephanosio

.github/workflows/devicetree_checks.yml

@@ -35,7 +35,7 @@ jobs:
     - name: checkout
       uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: cache-pip-linux

.github/workflows/twister_tests.yml

@@ -33,7 +33,7 @@ jobs:
     - name: checkout
       uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: cache-pip-linux

.github/workflows/west_cmds.yml

@@ -36,7 +36,7 @@ jobs:
     - name: checkout
       uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: cache-pip-linux